Merge pull request #54 from Proxmark/lf_recorder

[proxmark3-svn] / armsrc / iso14443.c

diff --git a/armsrc/iso14443.c b/armsrc/iso14443.c
index 5e8eddd24dd5d9fa3314f2eb513606a45ca40c66..6a2e4d6a41b90e3a11d4392b42b4a15ed43211b0 100644 (file)
--- a/armsrc/iso14443.c
+++ b/armsrc/iso14443.c
@@ -293,8 +293,7 @@ static int GetIso14443CommandFromReader(uint8_t *received, int *len, int maxLen)
     // only, since we are receiving, not transmitting).
     // Signal field is off with the appropriate LED
     LED_D_OFF();
-    FpgaWriteConfWord(
-       FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION);
+    FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION);
 
 
     // Now run a `software UART' on the stream of incoming samples.
@@ -340,16 +339,17 @@ void SimulateIso14443Tag(void)
     uint8_t *resp;
     int respLen;
 
-    uint8_t *resp1 = (((uint8_t *)BigBuf) + 800);
+    uint8_t *resp1 = BigBuf_get_addr() + 800;
     int resp1Len;
 
-    uint8_t *receivedCmd = (uint8_t *)BigBuf;
+    uint8_t *receivedCmd = BigBuf_get_addr();
     int len;
 
     int i;
 
     int cmdsRecvd = 0;
 
+    FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
     memset(receivedCmd, 0x44, 400);
 
     CodeIso14443bAsTag(response1, sizeof(response1));
@@ -400,8 +400,7 @@ void SimulateIso14443Tag(void)
         // Modulate BPSK
         // Signal field is off with the appropriate LED
         LED_D_OFF();
-        FpgaWriteConfWord(
-               FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_BPSK);
+        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_BPSK);
         AT91C_BASE_SSC->SSC_THR = 0xff;
         FpgaSetupSsc();
 
@@ -630,31 +629,32 @@ static void GetSamplesFor14443Demod(int weTx, int n, int quiet)
     int gotFrame = FALSE;
 
 //#   define DMA_BUFFER_SIZE 8
-    int8_t *dmaBuf;
+    uint8_t *dmaBuf;
 
     int lastRxCounter;
-    int8_t *upTo;
+    uint8_t *upTo;
 
     int ci, cq;
 
     int samples = 0;
 
     // Clear out the state of the "UART" that receives from the tag.
+       uint8_t *BigBuf = BigBuf_get_addr();
     memset(BigBuf, 0x00, 400);
-    Demod.output = (uint8_t *)BigBuf;
+    Demod.output = BigBuf;
     Demod.len = 0;
     Demod.state = DEMOD_UNSYNCD;
 
     // And the UART that receives from the reader
-    Uart.output = (((uint8_t *)BigBuf) + 1024);
+    Uart.output = BigBuf + 1024;
     Uart.byteCntMax = 100;
     Uart.state = STATE_UNSYNCD;
 
     // Setup for the DMA.
-    dmaBuf = (int8_t *)(BigBuf + 32);
+    dmaBuf = BigBuf + 32;
     upTo = dmaBuf;
     lastRxCounter = DEMOD_DMA_BUFFER_SIZE;
-    FpgaSetupSscDma((uint8_t *)dmaBuf, DEMOD_DMA_BUFFER_SIZE);
+    FpgaSetupSscDma(dmaBuf, DEMOD_DMA_BUFFER_SIZE);
 
     // Signal field is ON with the appropriate LED:
     if (weTx) LED_D_ON(); else LED_D_OFF();
@@ -867,6 +867,7 @@ void ReadSTMemoryIso14443(uint32_t dwLast)
 {
     uint8_t i = 0x00;
 
+    FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
     // Make sure that we start from off, since the tags are stateful;
     // confusing things will happen if we don't reset them between reads.
     LED_D_OFF();
@@ -1011,20 +1012,22 @@ void RAMFUNC SnoopIso14443(void)
     // response from the tag.
     int triggered = TRUE;
 
+    FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+       BigBuf_free();
     // The command (reader -> tag) that we're working on receiving.
-    uint8_t *receivedCmd = (uint8_t *)(BigBuf) + DEMOD_TRACE_SIZE;
+    uint8_t *receivedCmd = BigBuf_malloc(READER_TAG_BUFFER_SIZE);
     // The response (tag -> reader) that we're working on receiving.
-    uint8_t *receivedResponse = (uint8_t *)(BigBuf) + DEMOD_TRACE_SIZE + READER_TAG_BUFFER_SIZE;
+    uint8_t *receivedResponse = BigBuf_malloc(TAG_READER_BUFFER_SIZE);
 
     // As we receive stuff, we copy it from receivedCmd or receivedResponse
     // into trace, along with its length and other annotations.
-    uint8_t *trace = (uint8_t *)BigBuf;
-    int traceLen = 0;
+    uint8_t *trace = BigBuf_get_addr();
+    traceLen = 0;
 
     // The DMA buffer, used to stream samples from the FPGA.
-    int8_t *dmaBuf = (int8_t *)(BigBuf) + DEMOD_TRACE_SIZE + READER_TAG_BUFFER_SIZE + TAG_READER_BUFFER_SIZE;
+    uint8_t *dmaBuf = BigBuf_malloc(DEMOD_DMA_BUFFER_SIZE);
     int lastRxCounter;
-    int8_t *upTo;
+    uint8_t *upTo;
     int ci, cq;
     int maxBehindBy = 0;
 
@@ -1033,7 +1036,7 @@ void RAMFUNC SnoopIso14443(void)
     int samples = 0;
 
     // Initialize the trace buffer
-    memset(trace, 0x44, DEMOD_TRACE_SIZE);
+    memset(trace, 0x44, BigBuf_max_traceLen());
 
     // Set up the demodulator for tag -> reader responses.
     Demod.output = receivedResponse;
@@ -1048,7 +1051,7 @@ void RAMFUNC SnoopIso14443(void)
 
     // Print some debug information about the buffer sizes
     Dbprintf("Snooping buffers initialized:");
-    Dbprintf("  Trace: %i bytes", DEMOD_TRACE_SIZE);
+    Dbprintf("  Trace: %i bytes", BigBuf_max_traceLen());
     Dbprintf("  Reader -> tag: %i bytes", READER_TAG_BUFFER_SIZE);
     Dbprintf("  tag -> Reader: %i bytes", TAG_READER_BUFFER_SIZE);
     Dbprintf("  DMA: %i bytes", DEMOD_DMA_BUFFER_SIZE);
@@ -1075,7 +1078,7 @@ void RAMFUNC SnoopIso14443(void)
                                 (DEMOD_DMA_BUFFER_SIZE-1);
         if(behindBy > maxBehindBy) {
             maxBehindBy = behindBy;
-            if(behindBy > (DEMOD_DMA_BUFFER_SIZE-2)) { // TODO: understand whether we can increase/decrease as we want or not?
+            if(behindBy > (9*DEMOD_DMA_BUFFER_SIZE/10)) { // TODO: understand whether we can increase/decrease as we want or not?
                 Dbprintf("blew circular buffer! behindBy=0x%x", behindBy);
                 goto done;
             }
@@ -1146,7 +1149,7 @@ void RAMFUNC SnoopIso14443(void)
             trace[traceLen++] = Demod.len;
             memcpy(trace+traceLen, receivedResponse, Demod.len);
             traceLen += Demod.len;
-            if(traceLen > DEMOD_TRACE_SIZE) {
+            if(traceLen > BigBuf_max_traceLen()) {
                                DbpString("Reached trace limit");
                                goto done;
                        }
@@ -1172,9 +1175,9 @@ done:
        LED_A_OFF();
        LED_B_OFF();
        LED_C_OFF();
-  AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
+       AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
        DbpString("Snoop statistics:");
-  Dbprintf("  Max behind by: %i", maxBehindBy);
+       Dbprintf("  Max behind by: %i", maxBehindBy);
        Dbprintf("  Uart State: %x", Uart.state);
        Dbprintf("  Uart ByteCnt: %i", Uart.byteCnt);
        Dbprintf("  Uart ByteCntMax: %i", Uart.byteCntMax);
@@ -1196,6 +1199,7 @@ done:
 
 void SendRawCommand14443B(uint32_t datalen, uint32_t recv,uint8_t powerfield, uint8_t data[])
 {
+    FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
     if(!powerfield)
     {
         // Make sure that we start from off, since the tags are stateful;